AutoCodes – Nissan – P0118 2006 Nissan Altima Sedan

P0118 2006 Nissan Altima Sedan Code - Engine Coolant Temperature Sensor Circuit High

Quick Answer

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. Common causes include Low engine coolant level, Faulty Engine Coolant Temperature (ECT) sensor, Faulty engine coolant thermostat. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0118 2006 Nissan Altima Sedan indicates Engine Coolant Temperature Sensor Circuit High.
Common causes: Common causes include Low engine coolant level, Faulty Engine Coolant Temperature (ECT) sensor, Faulty engine coolant thermostat.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 6,440

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0118 2006 Nissan Altima Sedan Description

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the Engine Control Module (ECM). The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.

OBDII Code P0118 2006 Nissan Altima Sedan - Engine Coolant Temperature Sensor Circuit High - AutoCodes.com — P0118 2006 Nissan Altima Sedan Code - Engine Coolant Temperature Sensor Circuit High

What does this mean?

What are the Possible Causes of the DTC P0118 2006 Nissan Altima Sedan?

Low engine coolant level
Faulty Engine Coolant Temperature (ECT) sensor
Faulty engine coolant thermostat
Engine Coolant Temperature (ECT) sensor harness is open or shorted
Engine Coolant Temperature (ECT) sensor electrical circuit poor connection

How to Fix the DTC P0118 2006 Nissan Altima Sedan?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0118 2006 Nissan Altima Sedan code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0118 2006 Nissan Altima Sedan Code

1. What does OBDII code P0118 mean for a 2006 Nissan Altima Sedan?

The code P0118 indicates a high voltage signal from the Engine Coolant Temperature (ECT) sensor circuit in the 2006 Nissan Altima Sedan.

2. What are the common symptoms of a P0118 code in a 2006 Nissan Altima Sedan?

Common symptoms include the engine running hot or cold, poor fuel economy, rough idling, and potential overheating issues.

3. What are the possible causes of a P0118 code in a 2006 Nissan Altima Sedan?

Possible causes include a faulty ECT sensor, damaged wiring or connectors in the sensor circuit, low coolant levels, or a malfunctioning Engine Control Module (ECM).

4. How can I diagnose a P0118 code in my 2006 Nissan Altima Sedan?

You can diagnose the code by checking the ECT sensor's resistance, inspecting the sensor's wiring and connectors for damage, verifying coolant levels, and using a scan tool to monitor live data.

5. What are the repair options for a P0118 code in a 2006 Nissan Altima Sedan?

Repair options may include replacing the ECT sensor, repairing or replacing damaged wiring or connectors, topping up coolant levels, or resetting the ECM after fixing the issue.

6. Can a P0118 code in a 2006 Nissan Altima Sedan cause engine damage?

Continuously driving with a P0118 code can potentially lead to engine damage due to incorrect temperature readings affecting fuel delivery and engine performance. It's recommended to address the issue promptly.

7. Can I drive my 2006 Nissan Altima Sedan with a P0118 code?

It's not advisable to drive with a P0118 code as it can cause engine performance issues, reduced fuel efficiency, and potential overheating problems. It's best to address the underlying cause before driving the vehicle.

8. How much does it cost to repair a P0118 code in a 2006 Nissan Altima Sedan?

The cost of repairing a P0118 code can vary depending on the underlying issue, such as replacing the ECT sensor, fixing wiring, or addressing other related problems. Costs may range from a few dollars for a sensor to a few hundred dollars for more extensive repairs.

9. Will a P0118 code in a 2006 Nissan Altima Sedan affect emissions?

Yes, a P0118 code can potentially affect emissions as it may cause the engine to run too rich or too lean, leading to higher emissions. It's important to address the code to maintain optimal engine performance and emissions control.

10. How can I prevent a P0118 code from recurring in my 2006 Nissan Altima Sedan?

Regular maintenance, such as checking coolant levels, inspecting the ECT sensor and its connections, and addressing any issues promptly, can help prevent a P0118 code from recurring in your 2006 Nissan Altima Sedan.